STEVEN TYLER ALIEWAHI KUWA JUDGE WA AMERICAN IDOL ALICHOKIFANYA KAMA ULIMISS KUONA PITIA PICHA

Singing her heart out: But American Idol wannabe Pepper was revealed to be Steven Tyler in drag on Thursday night's show

Unmasked! When Pepper unveiled her wig she was none other than the Aerosmith frontman

The Aerosmith singer - a former judge on the show - turned up at the end of Thursday night's episode pretending to be a hopeful. 

Viewers thought the hour-long show had ended. 

But host Ryan Seacrest said: 'Wait, we still have one more audition for you.'

Pepper was seen walking into the judges' room. 

Singing her heart out: But the judges were quick to notice that there was something fishy about Pepper

And Keith Urban seemed to be the first to click that all was not what it seemed as he laughed and clapped. 

'What the, what?' said Randy Jackson as he looked up.

Tyler, 64, in a blonde wig, black tights and heels and showing off a large bust - said in a husky voice: 'My name is Pepper. I'm going to sing a song called 'Tell Your Ma, Tell Your Pa, Our Love Going to Grow, Wah Wah'.

'But before I do I'm going to judge you all [bleeps] first.

Show off! The singer shows off his dramatic flair for performing

'I like you men. The roosters may crow but the hens deliver the goods, do you know what I'm saying?'

He then cracked up as Randy Jackson shouted: 'Steven Tyler is in the house!'

'Do I go through to Hollywood or what?' Tyler asked.

'I thought it was Halloween,' said Randy Jackson. 'Has your chest grown?'

'This dude looks like a lady,' said Mariah Carey.